CN113364480A

CN113364480A - Radio frequency front end, chip and equipment

Info

Publication number: CN113364480A
Application number: CN202110511765.1A
Authority: CN
Inventors: 孙磊
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-09-07
Also published as: WO2022237325A1

Abstract

The application discloses radio frequency front end, chip and equipment relates to the radio frequency field, solves the problem that radio frequency signals of different frequency bands can not be adopted and are simultaneously connected with different mobile communication networks respectively. The radio frequency front end comprises: the antenna end of the first duplexer is connected with a first antenna, and the first antenna is used for transmitting a first output signal and receiving a first input signal; the antenna end of the second duplexer is connected with the first antenna, and the first antenna is also used for transmitting a second output signal and receiving a second input signal; the antenna end of the third duplexer is connected with a second antenna, and the second antenna is used for transmitting a third output signal and receiving a third input signal; the antenna end of the fourth duplexer is connected with the second antenna, and the second antenna is also used for transmitting a fourth output signal and receiving a fourth input signal; and the frequency bands of at least three of the first output signal, the second output signal, the third output signal and the fourth output signal are different from each other.

Description

Radio frequency front end, chip and equipment

Technical Field

The embodiment of the application relates to the field of radio frequency, in particular to a radio frequency front end, a chip and equipment.

Background

A mobile phone generally includes a radio frequency circuit (or referred to as a radio frequency chip). For example, as shown in fig. 1, the present rf circuit may include an rf transceiver module, an rf front end, and an antenna. When the mobile phone needs to send signals for communication, the baseband chip (or called baseband subsystem) can send baseband signals to the radio frequency transceiver module of the radio frequency circuit, the radio frequency transceiver module can convert the baseband signals into radio frequency signals and send the radio frequency signals to the radio frequency front end, and the radio frequency front end can finally transmit the radio frequency signals by using the antenna. When the mobile phone receives signals, the antenna of the radio frequency circuit can send the radio frequency signals to the radio frequency front end after receiving the radio frequency signals, the radio frequency front end can send the radio frequency signals received by the antenna to the radio frequency transceiver module, and the radio frequency transceiver module can send the received radio frequency signals to the baseband chip for processing after converting the received radio frequency signals into baseband signals. Thereby realizing the long-distance mobile communication of the mobile phone.

At present, a radio frequency transceiver module of a mobile phone can only transmit radio frequency signals of a single frequency band once through a radio frequency front end, and cannot simultaneously transmit radio frequency signals of two different frequency bands. For example, as shown in fig. 2, the rf front end may include a Power Amplifier (PA), a Low Noise Amplifier (LNA), and a duplexer (including an output signal terminal and an input signal terminal). The radio frequency transceiver module can send a radio frequency signal of a certain frequency band to a power amplifier in the radio frequency front end, the radio frequency signal is amplified by the power amplifier and then sent to an antenna through an output signal end of the duplexer, and finally the radio frequency signal is sent out by the antenna. After the antenna receives the radio-frequency signals of the corresponding frequency band, the received radio-frequency signals can be sent to the low-noise amplifier through the input signal end of the duplexer, and finally the received radio-frequency signals are sent to the radio-frequency receiving and sending module through the low-noise amplifier to be received. Generally, the frequency band of the rf signal received and transmitted by the rf transceiver module corresponds to the operating frequency band of the duplexer of the rf front end, so that the rf transceiver module can only transmit the rf signal of a single frequency band at a time through the current rf front end. However, with the continuous development of mobile communication networks, the mobile communication networks have been developed to the fifth generation (5G) mobile communication networks. Therefore, many mobile phones can support 5G and beyond mobile communication networks so that the mobile phones can support connection with various generations of mobile communication networks. When the mobile phone is connected to the 5G mobile communication network, the frequency band of the radio frequency signal generally adopts the frequency band 28A or the frequency band 20. When the mobile phone is connected to the 4G mobile communication network, the frequency band of the radio frequency signal generally adopts the frequency band 20 or the frequency band 8. Therefore, when the mobile phone is connected to the 5G mobile communication network and the 4G mobile communication network simultaneously, there exists a case where a radio frequency signal (for example, frequency band 20) in a certain frequency band is connected to the 5G mobile communication network, and a radio frequency signal (for example, frequency band 8) in another frequency band is connected to the 4G mobile communication network, that is, radio frequency signals in different frequency bands are respectively connected to the two mobile communication networks simultaneously. At this time, the mobile phone cannot meet the requirement that the radio frequency signals of different frequency bands are respectively connected with different mobile communication networks at the same time.

Disclosure of Invention

The embodiment of the application provides a radio frequency front end, a chip and equipment, and solves the problem that the requirement that radio frequency signals adopting different frequency bands are respectively and simultaneously connected with different mobile communication networks cannot be met.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a radio frequency front end, including: the antenna end of the first duplexer is connected with a first antenna, the first antenna is used for transmitting a first output signal and receiving a first input signal, and the frequency band of the first output signal is the same as that of the first input signal; the output signal end of the second duplexer is used for receiving a second output signal sent by the radio frequency transceiver module, the input signal end of the second duplexer is used for sending a received second input signal to the radio frequency transceiver module, the antenna end of the second duplexer is connected with the first antenna, the first antenna is also used for transmitting a second output signal and receiving a second input signal, and the frequency bands of the second output signal and the second input signal are the same; an output signal end of the third duplexer is used for receiving a third output signal sent by the radio frequency transceiving module, an input signal end of the third duplexer is used for sending a received third input signal to the radio frequency transceiving module, an antenna end of the third duplexer is connected with a second antenna, the second antenna is used for transmitting a third output signal and receiving a third input signal, and the third output signal and the third input signal have the same frequency band; an output signal end of the fourth duplexer is used for receiving a fourth output signal sent by the radio frequency transceiving module, an input signal end of the fourth duplexer is used for sending a received fourth input signal to the radio frequency transceiving module, an antenna end of the fourth duplexer is connected with the second antenna, the second antenna is also used for transmitting the fourth output signal and receiving the fourth input signal, and the frequency bands of the fourth output signal and the fourth input signal are the same; and the frequency bands of at least three of the first output signal, the second output signal, the third output signal and the fourth output signal are different from each other.

When the rf transceiver module transmits a first output signal, the output signal terminal of the first duplexer may receive the first output signal and transmit the first output signal to the first antenna through the antenna terminal of the first duplexer, so that the first antenna transmits the first output signal. Accordingly, when the first antenna receives the first input signal, the first antenna may send the first input signal to the antenna terminal of the first duplexer, so that the first duplexer may send the first input signal to the rf transceiver module through the input signal terminal. Similarly, when the rf transceiver module transmits the second output signal, the output signal terminal of the second duplexer may receive the second output signal and transmit the second output signal to the first antenna through the antenna terminal of the second duplexer, so that the first antenna transmits the second output signal. Accordingly, when the first antenna receives the second input signal, the first antenna may transmit the second input signal to the antenna terminal of the second duplexer, so that the second duplexer may transmit the second input signal to the radio frequency transceiver module through the input signal terminal. When the rf transceiver module transmits the third output signal, the output signal terminal of the third duplexer may receive the third output signal and transmit the third output signal to the second antenna through the antenna terminal of the third duplexer, so that the second antenna transmits the third output signal. Accordingly, when the second antenna receives the third input signal, the second antenna may transmit the third input signal to the antenna terminal of the third duplexer, so that the third duplexer may transmit the third input signal to the rf transceiver module through the input signal terminal. When the rf transceiver module transmits the fourth output signal, the output signal terminal of the fourth duplexer may receive the fourth output signal and transmit the fourth output signal to the second antenna through the antenna terminal of the fourth duplexer, so that the second antenna transmits the fourth output signal. Accordingly, when the second antenna receives the fourth input signal, the second antenna may send the fourth input signal to the antenna end of the fourth duplexer, so that the fourth duplexer may send the fourth input signal to the rf transceiver module through the input signal end. Therefore, the radio frequency transceiver module can utilize the radio frequency front end to simultaneously transmit and receive radio frequency signals through the first antenna and the second antenna, and further the radio frequency transceiver module can utilize the radio frequency front end to simultaneously transmit and receive radio frequency signals of two different frequency bands through the first antenna and the second antenna so as to meet the requirement of simultaneous connection with different mobile communication networks.

In a possible implementation manner, the radio frequency front end further includes a diversity module and a third antenna; the diversity module is connected with the third antenna, the diversity module is used for sending the received diversity signal to the radio frequency transceiving module, and the third antenna is used for receiving the diversity signal.

By arranging the diversity module and the third antenna, the diversity signal can be received by the third antenna and the diversity module and sent to the radio frequency transceiving module. The RF transceiver module can realize the diversity technology through the RF front end, thereby compensating the loss of the RF signal by using the diversity signal and improving the information transmission quality.

In another possible implementation manner, the diversity signal includes at least one of a first diversity signal, a second diversity signal, and a third diversity signal having different frequency bands, and the diversity module includes a first filter, a second filter, and a third filter, which are respectively connected to the third antenna, where the first filter is configured to send the first diversity signal to the radio frequency transceiver module, the second filter is configured to send the second diversity signal to the radio frequency transceiver module, and the third filter is configured to send the third diversity signal to the radio frequency transceiver module.

By arranging the filters corresponding to the diversity signals of different frequency bands, the diversity signals mixed together can be separated according to different frequency bands, so that the radio frequency transceiving modules are respectively transmitted.

In another possible implementation, the passband frequency range of the output signal end of the first duplexer includes 703MHz-733MHz, the passband frequency range of the input signal end of the first duplexer includes 758MHz-788MHz, the passband frequency range of the output signal end of the second duplexer includes 832MHz-862MHz, the passband frequency range of the input signal end of the second duplexer includes 791MHz-821MHz, the passband frequency range of the output signal end of the third duplexer includes 832MHz-862MHz, the passband frequency range of the input signal end of the third duplexer includes 791MHz-821MHz, the frequency range of the output signal end of the fourth duplexer includes 880-915 MHz, the passband frequency range of the input signal end of the fourth duplexer includes 925MHz-960MHz, the passband frequency range of the first filter includes 758MHz-788MHz, the passband frequency range of the second filter comprises 791MHz-821MHz and the passband frequency range of the third filter comprises 925MHz-960 MHz. In this way, the radio frequency front end can transmit and receive the radio frequency signal with the frequency band of 28A or 20 a through the first antenna, and transmit and receive the radio frequency signal with the frequency band of 20 or 8 through the second antenna, so that the frequency band signals of different combinations of the frequency bands can be transmitted through the first antenna and the second antenna at the same time.

In another possible implementation manner, the frequency bands of the first output signal and the first input signal are both the frequency band 28A, the frequency range of the first output signal is 703MHz-733MHz, and the frequency range of the first input signal is 758MHz-788 MHz; the frequency bands of the second output signal and the second input signal are both 20, the frequency range of the second output signal is 832MHz-862MHz, and the frequency range of the second input signal is 791MHz-821 MHz; the frequency bands of the third output signal and the third input signal are both 20, the frequency range of the third output signal is 832MHz-862MHz, and the frequency range of the third input signal is 791MHz-821 MHz; the frequency bands of the fourth output signal and the fourth input signal are both 8, the frequency range of the fourth output signal is 880MHz-915MHz, and the frequency range of the fourth input signal is 925MHz-960 MHz;

when the electronic device is connected to the fifth generation mobile communication network through the frequency band 28A and is connected to the fourth generation mobile communication network through the frequency band 20, the first antenna transmits the first output signal and receives the first input signal, and the second antenna transmits the third output signal and receives the third input signal;

when the electronic device is connected to the fifth generation mobile communication network through the frequency band 28A and is connected to the fourth generation mobile communication network through the frequency band 8, the first antenna transmits the first output signal and receives the first input signal, and the second antenna transmits the fourth output signal and receives the fourth input signal;

when the electronic device is connected to the fifth generation mobile communication network through the frequency band 20 and is connected to the fourth generation mobile communication network through the frequency band 8, the first antenna transmits the second output signal and receives the second input signal, and the second antenna transmits the fourth output signal and receives the fourth input signal. In this way, the electronic device can simultaneously transmit radio frequency signals of the frequency band 28A and the frequency band 20, the frequency band 28A and the frequency band 8, or two different frequency bands of the frequency band 20 and the frequency band 8 through the radio frequency front end to be connected with the fifth generation mobile communication network and the fourth generation mobile communication network respectively.

In another possible implementation manner, the radio frequency front end further includes a first switch and a second switch; an output signal end of the first duplexer and an output signal end of the second duplexer are respectively connected with the first switch, an antenna end of the first duplexer and an antenna end of the second duplexer are respectively connected with the first antenna through the second switch, the first switch is used for controlling the output signal end of the first duplexer to receive the first output signal, or the output signal end of the second duplexer to receive the second output signal, and the second switch is used for controlling the first antenna to transmit the first output signal, or the first antenna to transmit the second output signal. Therefore, the first switch and the second switch can be used for switching and controlling the paths when the first output signal and the second output signal need to be sent by the radio frequency front end, so that interference signals of other frequency bands are prevented from generating interference on normal radio frequency signal receiving and sending of the radio frequency receiving and sending module through other paths.

In another possible implementation manner, the radio frequency front end further includes a third switch, a fourth switch, and a fifth switch; an output signal end of the third duplexer and an output signal end of the fourth duplexer are respectively connected with the third switch, an antenna end of the third duplexer and an antenna end of the fourth duplexer are respectively connected with the fifth switch through the fourth switch, the fifth switch is also respectively connected with the second antenna, the third antenna and the diversity module, the third switch is used for controlling the output signal end of the third duplexer to receive the third output signal, or the output signal end of the fourth duplexer to receive the fourth output signal, the fourth switch and the fifth switch are used for controlling the second antenna to transmit the third output signal, or the second antenna to transmit the fourth output signal, and the fifth switch is also used for controlling the diversity module to receive the diversity signal. Therefore, the third switch, the fourth switch and the fifth switch can be used for switching and controlling the paths of the third output signal and the fourth output signal which need to be sent by the radio frequency front end, so that interference of interference signals of other frequency bands to normal radio frequency signal receiving and sending of the radio frequency receiving and sending module through other paths is avoided.

In another possible implementation manner, the diversity module further includes a sixth switch, the fifth switch is connected to the first filter, the second filter, and the third filter through the sixth switch, and the sixth switch is configured to control at least one of the first filter, the second filter, and the third filter to communicate with the third antenna. In this way, when the diversity signal received by the third antenna includes which frequency bands, the corresponding filter and the third antenna may be correspondingly connected through the sixth switch.

In another possible implementation manner, the radio frequency front end further includes a first amplifier and a second amplifier, the first amplifier is connected to the first switch, the first amplifier is configured to amplify the first output signal and the second output signal sent by the radio frequency transceiver module, the second amplifier is connected to the third switch, and the second amplifier is configured to amplify the third output signal and the fourth output signal sent by the radio frequency transceiver module. In this way, the power of the first output signal and the second output signal can be amplified through the first amplifier, which facilitates the propagation of the finally transmitted first output signal and second output signal for a longer distance. The power of the third output signal and the fourth output signal is amplified by the second amplifier, thereby facilitating the propagation of the finally transmitted third output signal and fourth output signal over greater distances.

In a second aspect, an embodiment of the present application further provides a radio frequency chip, where the radio frequency chip may include a radio frequency transceiver module and the radio frequency front end according to the first aspect.

In a third aspect, an embodiment of the present application further provides an electronic device, which may include the radio frequency chip according to the first aspect.

It should be understood that, the beneficial effects of the second and third aspects can be referred to the related description of the first aspect, and are not described herein again.

Drawings

Fig. 1 is a schematic structural diagram of a wireless communication system provided in the related art;

fig. 2 is a schematic structural diagram of a radio frequency circuit provided in the related art;

fig. 3 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a radio frequency front end according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of another rf front end according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a diversity module according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a radio frequency chip according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same or similar items having substantially the same function and action. For example, the first device and the second device are only used for distinguishing different devices, and the sequence order thereof is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

It should be noted that the network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and it is known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.

A mobile phone generally includes a radio frequency circuit (or referred to as a radio frequency chip). The radio frequency circuit can convert baseband signals of the baseband chip (or called baseband subsystem) into radio frequency signals and transmit the radio frequency signals through the antenna, and the radio frequency circuit can convert the radio frequency signals received by the antenna into baseband signals and transmit the baseband signals to the baseband chip for processing, so that the long-distance mobile communication of the mobile phone is realized. For example, as shown in fig. 1, a current wireless communication system may include a baseband chip and radio frequency circuits, wherein the radio frequency circuits may include a radio frequency transceiver module, a radio frequency front end, and an antenna. When the mobile phone needs to send signals for communication, the baseband chip (or called baseband subsystem) can send baseband signals to the radio frequency transceiver module of the radio frequency circuit, the radio frequency transceiver module can convert the baseband signals into radio frequency signals and send the radio frequency signals to the radio frequency front end, and the radio frequency front end can finally transmit the radio frequency signals by using the antenna. When the mobile phone receives signals, the antenna of the radio frequency circuit can send the radio frequency signals to the radio frequency front end after receiving the radio frequency signals, the radio frequency front end can send the radio frequency signals received by the antenna to the radio frequency transceiver module, and the radio frequency transceiver module can send the received radio frequency signals to the baseband chip for processing after converting the received radio frequency signals into baseband signals.

Currently, the frequency band of the radio frequency signal transmitted by the mobile phone generally includes a frequency band 28A (i.e., the frequency range of the transmitted signal is 703MHz-733MHz, and the frequency range of the received signal is 758MHz-788MHz), a frequency band 20 (i.e., the frequency range of the transmitted signal is 832MHz-862MHz, and the frequency range of the received signal is 791MHz-821MHz), and a frequency band 8 (i.e., the frequency range of the transmitted signal is 880MHz-915MHz, and the frequency range of the received signal is 925MHz-960 MHz). For example, the mobile phone may be connected to a 5G mobile communication network through a radio frequency signal with a frequency band of 28A or 20 a, and connected to a 4G mobile communication network through a radio frequency signal with a frequency band of 20 or 8A. Generally, a mobile phone can only transmit a radio frequency signal of a single frequency band at a time through a radio frequency circuit, and cannot simultaneously transmit two or more radio frequency signals of different frequency bands. For example, as shown in fig. 2, the rf circuit may include an rf transceiver module, an rf front end and an antenna, wherein the rf front end may include a Power Amplifier (PA), a Low Noise Amplifier (LNA) and a duplexer (including an output signal terminal and an input signal terminal). The radio frequency transceiver module can send a radio frequency signal of a certain frequency band to a power amplifier in the radio frequency front end, the radio frequency signal is amplified by the power amplifier and then sent to an antenna through an output signal end of the duplexer, and finally the radio frequency signal is sent out by the antenna. After the antenna receives the radio-frequency signals of the corresponding frequency band, the received radio-frequency signals can be sent to the low-noise amplifier through the input signal end of the duplexer, and finally the received radio-frequency signals are sent to the radio-frequency receiving and sending module through the low-noise amplifier to be received. Generally, the frequency band of the rf signal received and transmitted by the rf transceiver module corresponds to the operating frequency band of the duplexer of the rf front end, so that the rf transceiver module can only transmit the rf signal of a single frequency band at a time through the current rf front end.

Therefore, when the mobile phone is simultaneously connected to the 4G mobile communication network and the 5G mobile communication network, the mobile phone can be simultaneously connected to the two mobile communication networks only through the radio frequency signals of the common frequency band of the 4G mobile communication network and the 5G mobile communication network. For example, the mobile phone may be simultaneously connected to the 5G mobile communication network and the 4G mobile communication network through the radio frequency signal with the frequency band of 20. However, the mobile phone cannot be connected to the 5G mobile communication network by using the radio frequency signal of a certain frequency band, and is connected to the 4G mobile communication network by using the radio frequency signal of another frequency band, that is, the mobile phone is simultaneously connected to two mobile communication networks by using the radio frequency signals of different frequency bands. For example, the handset cannot simultaneously transmit two radio frequency signals in the frequency bands 28A and 20 to connect to the 5G mobile communication network and the 4G mobile communication network, respectively. It is impossible to simultaneously transmit two rf signals of the frequency band 28A and the frequency band 8 to connect to the 5G mobile communication network and the 4G mobile communication network, respectively. Of course, it is impossible to simultaneously transmit rf signals in the frequency bands 20 and 8 for connecting to the 5G mobile communication network and the 4G mobile communication network, respectively.

In order to solve the above problem, an embodiment of the present application provides a radio frequency front end, which may be applied to an electronic device with a communication function.

The electronic device includes a terminal device, which may also be referred to as a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and so on. The terminal device may be a mobile phone (mobile phone), a smart tv, a wearable device, a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

In order to better understand the embodiments of the present application, the following describes the structure of the terminal device according to the embodiments of the present application:

fig. 3 shows a schematic structural diagram of the terminal device 100. The terminal device may include: a Radio Frequency (RF) circuit 110 (e.g., the RF circuit shown in fig. 1), a memory 120, an input unit 130, a display unit 140, a sensor 150, an audio circuit 160, a wireless fidelity (WiFi) module 170, a processor 180, a power supply 190, and a bluetooth module 1100. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 3 does not constitute a limitation of the terminal device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

The following specifically describes each constituent component of the terminal device with reference to fig. 3:

the RF circuit 110 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 180; in addition, the data for designing uplink is transmitted to the base station. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 110 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to global system for mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, and Short Message Service (SMS).

The memory 120 may be used to store software programs and modules, and the processor 180 executes various functional applications and data processing of the terminal device by operating the software programs and modules stored in the memory 120. The memory 120 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, a boot loader (boot loader), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal device, and the like. Further, the memory 120 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. It is understood that, in the embodiment of the present application, the memory 120 stores a program for the bluetooth device to connect back.

The input unit 130 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the terminal device. Specifically, the input unit 130 may include a touch panel 131 and other input devices 132. The touch panel 131, also referred to as a touch screen, may collect touch operations of a user on or near the touch panel 131 (e.g., operations of the user on or near the touch panel 131 using any suitable object or accessory such as a finger or a stylus pen), and drive the corresponding connection device according to a preset program. Alternatively, the touch panel 131 may include two parts, i.e., a touch detection device and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 180, and can receive and execute commands sent by the processor 180. In addition, the touch panel 131 may be implemented by various types such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. The input unit 130 may include other input devices 132 in addition to the touch panel 131. In particular, other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 140 may be used to display information input by a user or information provided to the user and various menus of the terminal device. The display unit 140 may include a display panel 141, and optionally, the display panel 141 may be configured in the form of a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), or the like. Further, the touch panel 131 can cover the display panel 141, and when the touch panel 131 detects a touch operation on or near the touch panel 131, the touch operation is transmitted to the processor 180 to determine the type of the touch event, and then the processor 180 provides a corresponding visual output on the display panel 141 according to the type of the touch event. Although in fig. 3, the touch panel 131 and the display panel 141 are two independent components to implement the input and output functions of the terminal device, in some embodiments, the touch panel 131 and the display panel 141 may be integrated to implement the input and output functions of the terminal device.

The terminal device may also include at least one sensor 150, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel 141 according to the brightness of ambient light, and a proximity sensor that turns off the display panel 141 or a backlight when the terminal device is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration) for recognizing the attitude of the terminal device, and related functions (such as pedometer and tapping) for vibration recognition; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal device, detailed description is omitted here.

Audio circuitry 160, speaker 161, and microphone 162 may provide an audio interface between the user and the terminal device. The audio circuit 160 may transmit the electrical signal converted from the received audio data to the speaker 161, and convert the electrical signal into a sound signal for output by the speaker 161; on the other hand, the microphone 162 converts the collected sound signal into an electric signal, converts the electric signal into audio data after being received by the audio circuit 160, and outputs the audio data to the processor 180 for processing, and then transmits the audio data to, for example, another terminal device via the RF circuit 110, or outputs the audio data to the memory 120 for further processing.

WiFi belongs to a short-distance wireless transmission technology, and the terminal device can help a user to send and receive e-mails, browse webpages, access streaming media and the like through the WiFi module 170, and provides wireless broadband internet access for the user. Although fig. 3 shows the WiFi module 170, it is understood that it does not belong to the essential constitution of the terminal device, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 180 is a control center of the terminal device, connects various parts of the entire terminal device using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs or modules stored in the memory 120 and calling data stored in the memory 120, thereby integrally monitoring the terminal device. Alternatively, processor 180 may include one or more processing units; preferably, the processor 180 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 180. It is understood that in the embodiment of the present application, the memory 120 stores a program for bluetooth device loopback, and the processor 180 may be configured to call and execute the program for bluetooth device loopback stored in the memory 120, so as to implement the method for bluetooth device loopback in the embodiment of the present application.

The terminal device also includes a power supply 190 (e.g., a battery) for supplying power to the various components, and preferably, the power supply may be logically connected to the processor 180 via a power management system, so that functions such as managing charging, discharging, and power consumption may be performed via the power management system.

The bluetooth technology belongs to short distance wireless transmission technology, and terminal equipment can establish bluetooth connection with other terminal equipment that possess bluetooth module through bluetooth module 1100 to data transmission carries out based on the bluetooth communication link. The bluetooth module 1100 may be Bluetooth Low Energy (BLE) or a module according to actual needs. It can be understood that, in the case that the terminal device in the embodiment of the present application is a user terminal and a service tool, the terminal device includes a bluetooth module. It is to be understood that the bluetooth module does not belong to the essential constitution of the terminal device and may be omitted entirely as needed within the scope not changing the essence of the invention, for example, the bluetooth module may not be included in the server.

Although not shown, the terminal device may further include a camera. Optionally, the position of the camera on the terminal device may be front-located, rear-located, or built-in (the camera body may be extended when in use), which is not limited in this embodiment of the present application.

Optionally, the terminal device may include a single camera, a dual camera, or a triple camera, and the like, which is not limited in this embodiment. Cameras include, but are not limited to, wide angle cameras, tele cameras, or depth cameras, among others.

For example, the terminal device may include three cameras, one being a main camera, one being a wide camera, and one being a tele camera.

Optionally, when the terminal device includes a plurality of cameras, the plurality of cameras may be all front-mounted, all rear-mounted, all built-in, at least partially front-mounted, at least partially rear-mounted, or at least partially built-in, and the like, which is not limited in this embodiment of the application.

As shown in fig. 4, the rf front end may include a first duplexer 201, a second duplexer 202, a third duplexer 203, a fourth duplexer 204, a first antenna 211, a second antenna 212, and the like. The output signal terminal 2011 of the first duplexer may be configured to receive a first output signal sent by the rf transceiver module (that is, the output signal terminal 2011 of the first duplexer may be connected to the rf transceiver module in an application), the input signal terminal 2012 of the first duplexer is configured to send a received first input signal to the rf transceiver module (that is, the input signal terminal 2012 of the first duplexer may be connected to the rf transceiver module in an application), the antenna end of the first duplexer 201 is connected to the first antenna 211, and the first antenna 211 is configured to transmit a first output signal and receive a first input signal. The output signal terminal 2021 of the second duplexer is configured to receive a second output signal sent by the rf transceiver module (i.e., the output signal terminal 2021 of the second duplexer may be connected to the rf transceiver module in an application), the input signal terminal 2022 of the second duplexer is configured to send a received second input signal to the rf transceiver module (i.e., the input signal terminal 2022 of the second duplexer may be connected to the rf transceiver module in an application), the antenna terminal of the second duplexer 202 is connected to the first antenna 211, and the first antenna 211 is further configured to transmit the second output signal and receive the second input signal. The output signal terminal 2031 of the third duplexer is configured to receive a third output signal sent by the rf transceiver module (that is, the output signal terminal 2031 of the third duplexer may be connected to the rf transceiver module in application), the input signal terminal 2032 of the third duplexer is configured to send a received third input signal to the rf transceiver module (that is, the input signal terminal 2032 of the third duplexer may be connected to the rf transceiver module in application), the antenna terminal of the third duplexer 203 is connected to the second antenna 212, and the second antenna 212 is configured to send the third output signal and receive the third input signal. An output signal terminal 2041 of the fourth duplexer is configured to receive a fourth output signal sent by the radio frequency transceiver module (that is, the output signal terminal 2041 of the fourth duplexer may be connected to the radio frequency transceiver module in application), an input signal terminal 2042 of the fourth duplexer is configured to send a received fourth input signal to the radio frequency transceiver module (that is, the input signal terminal 2042 of the fourth duplexer may be connected to the radio frequency transceiver module in application), an antenna terminal of the fourth duplexer 204 is connected to the second antenna 212, and the second antenna 212 is further configured to send the fourth output signal and receive the fourth input signal.

It should be noted that the frequency band of the first output signal is the same as that of the first input signal; the second output signal and the second input signal have the same frequency band; the third output signal and the third input signal have the same frequency band; the fourth output signal and the fourth input signal are in the same frequency band. The frequency bands of at least three of the first output signal, the second output signal, the third output signal and the fourth output signal are different from each other. For example, the frequency bands of the first output signal and the first input signal are both the frequency band 28A, that is, the frequency range of the first output signal is 703MHz-733MHz, and the frequency range of the first input signal is 758MHz-788 MHz; the frequency bands of the second output signal and the second input signal are both 20, namely the frequency range of the second output signal is 832MHz-862MHz, and the frequency range of the second input signal is 791MHz-821 MHz; the frequency bands of the third output signal and the third input signal are both 20, that is, the frequency range of the third output signal is 832MHz-862MHz, and the frequency range of the third input signal is 791MHz-821 MHz; the frequency bands of the fourth output signal and the fourth input signal are both frequency bands 8, that is, the frequency range of the fourth output signal is 880MHz-915MHz, and the frequency range of the fourth input signal is 925MHz-960 MHz. Of course, in some other embodiments of the present application, the frequency bands of the first output signal and the first input signal, the frequency bands of the second output signal and the second input signal, the frequency bands of the third output signal and the third input signal, and the frequency bands of the fourth output signal and the fourth input signal may also be set to other frequency bands, respectively, as needed, and the present application is not limited herein. For example, the above frequency bands may include the frequency band 28B, the frequency band 12, and the like in addition to the above examples.

In general, the pass band frequency ranges of the output signal terminal 2011 and the input signal terminal of the first duplexer may be set according to the frequency ranges of the first output signal and the first input signal. Likewise, the passband frequency range of the input signal side of the second duplexer's output signal side 2021 may be set according to the frequency ranges of the second output signal and the second input signal. The passband frequency range of the input signal terminal of the output signal terminal 2031 of the third duplexer may be set according to the frequency ranges of the third output signal and the third input signal. The passband frequency range of the input signal side of the fourth duplexer's output signal side 2041 may be set according to the frequency ranges of the fourth output signal and the fourth input signal.

Illustratively, the frequency bands of the first output signal and the first input signal are both frequency bands 28A; the frequency bands of the second output signal and the second input signal are both frequency bands 20; the frequency bands of the third output signal and the third input signal are both 20; the frequency bands of the fourth output signal and the fourth input signal are both frequency band 8 as an example. Then, the passband frequency range of the output signal terminal 2011 of the first duplexer is comprised from 703MHz to 733MHz, and the passband frequency range of the input signal terminal 2012 of the first duplexer is comprised from 758MHz to 788 MHz; the passband frequency range of the output signal terminal 2021 of the second duplexer comprises 832MHz-862MHz, and the passband frequency range of the input signal terminal 2022 of the second duplexer comprises 791MHz-821 MHz; the passband frequency range of the output signal terminal 2031 of the third duplexer includes 832MHz-862MHz, and the passband frequency range of the input signal terminal 2032 of the third duplexer includes 791MHz-821 MHz; the passband frequency range of the output signal terminal 2041 of the fourth duplexer includes 880MHz-915MHz, and the passband frequency range of the input signal terminal 2042 of the fourth duplexer includes 925MHz-960 MHz.

When the rf front end transmits the first output signal, the output signal 2011 of the first duplexer may receive the first output signal and transmit the first output signal to the first antenna 211 through the antenna of the first duplexer 201, so that the first antenna 211 transmits the first output signal. Accordingly, when the first antenna 211 receives the first input signal, the first antenna 211 may transmit the first input signal to the antenna terminal of the first duplexer 201, so that the first duplexer 201 may transmit the first input signal to the rf transceiver module through the input signal terminal. Similarly, when the rf transceiver module transmits a second output signal, the output signal terminal 2021 of the second duplexer may receive the second output signal and transmit the second output signal to the first antenna 211 through the antenna terminal of the second duplexer 202, so that the first antenna 211 transmits the second output signal. Accordingly, when the first antenna 211 receives the second input signal, the first antenna 211 may transmit the second input signal to the antenna terminal of the second duplexer 202, so that the second duplexer 202 may transmit the second input signal to the rf transceiver module through the input signal terminal. When the rf transceiver module transmits the third output signal, the output signal terminal 2031 of the third duplexer can receive the third output signal and transmit the third output signal to the second antenna 212 through the antenna terminal of the third duplexer 203, so that the second antenna 212 transmits the third output signal. Accordingly, when the second antenna 212 receives the third input signal, the second antenna 212 may transmit the third input signal to the antenna terminal of the third duplexer 203, so that the third duplexer 203 may transmit the third input signal to the rf transceiver module through the input signal terminal. When the rf transceiver module transmits the fourth output signal, the output signal terminal 2041 of the fourth duplexer can receive the fourth output signal and transmit the fourth output signal to the second antenna 212 through the antenna terminal of the fourth duplexer 204, so that the second antenna 212 transmits the fourth output signal. Accordingly, when the second antenna 212 receives the fourth input signal, the second antenna 212 may transmit the fourth input signal to the antenna terminal of the fourth duplexer 204, so that the fourth duplexer 204 may transmit the fourth input signal to the rf transceiver module through the input signal terminal. Therefore, the rf transceiver module can simultaneously transmit and receive rf signals through the first antenna 211 and the second antenna 212 by using the rf front end, and further the rf transceiver module can simultaneously transmit and receive rf signals of two different frequency bands through the first antenna 211 and the second antenna 212 by using the rf front end to simultaneously connect to different mobile communication networks.

For example, the frequency bands of the first output signal and the first input signal are both the frequency band 28A; the frequency bands of the second output signal and the second input signal are both frequency bands 20; the frequency bands of the third output signal and the third input signal are both 20; the frequency bands of the fourth output signal and the fourth input signal are both frequency bands 8, and the electronic device is a mobile phone as an example.

When the mobile phone is connected to the 5G mobile communication network through the frequency band 28A and connected to the 4G mobile communication network through the frequency band 20, the rf transceiver module may transmit and receive the first output signal and the first input signal, and the third output signal and the third input signal. At this time, the rf front end may receive the first output signal sent by the rf transceiver module through the output signal terminal 2011 of the first duplexer and send the first output signal to the first antenna 211 through the antenna terminal of the first duplexer 201, so that the first antenna 211 transmits the first output signal. Accordingly, when the first antenna 211 receives the first input signal, the first antenna 211 may transmit the first input signal to the antenna terminal of the first duplexer 201, so that the first duplexer 201 may transmit the first input signal to the rf transceiver module through the input signal terminal. The output signal terminal 2031 of the third duplexer receives the third output signal sent by the rf transceiver module and sends the third output signal to the second antenna 212 through the antenna terminal of the third duplexer 203, so that the second antenna 212 transmits the third output signal. Accordingly, when the second antenna 212 receives the third input signal, the second antenna 212 may transmit the third input signal to the antenna terminal of the third duplexer 203, so that the third duplexer 203 may transmit the third input signal to the rf transceiver module through the input signal terminal. That is, when the mobile phone is connected to the 5G mobile communication network through the frequency band 28A and connected to the 4G mobile communication network through the frequency band 20, the mobile phone may receive and transmit the radio frequency signal with the frequency band 28A through the first antenna 211 to be connected to the 5G mobile communication network, and simultaneously receive and transmit the radio frequency signal with the frequency band 20 through the second antenna 212 to be connected to the 4G mobile communication network.

When the mobile phone is connected to the 5G mobile communication network through the frequency band 28A and connected to the 4G mobile communication network through the frequency band 8, the rf transceiver module may transmit and receive the first output signal and the first input signal, and the fourth output signal and the fourth input signal. At this time, the rf front end may receive the first output signal sent by the rf transceiver module through the output signal terminal 2011 of the first duplexer and send the first output signal to the first antenna 211 through the antenna terminal of the first duplexer 201, so that the first antenna 211 transmits the first output signal. Accordingly, when the first antenna 211 receives the first input signal, the first antenna 211 may transmit the first input signal to the antenna terminal of the first duplexer 201, so that the first duplexer 201 may transmit the first input signal to the rf transceiver module through the input signal terminal. The output signal terminal 2041 of the fourth duplexer receives the fourth output signal sent by the rf transceiver module and sends the fourth output signal to the second antenna 212 through the antenna terminal of the fourth duplexer 204, so that the second antenna 212 transmits the fourth output signal. Accordingly, when the second antenna 212 receives the fourth input signal, the second antenna 212 may transmit the fourth input signal to the antenna terminal of the fourth duplexer 204, so that the fourth duplexer 204 may transmit the fourth input signal to the rf transceiver module through the input signal terminal. That is, when the mobile phone is connected to the 5G mobile communication network through the frequency band 28A and connected to the 4G mobile communication network through the frequency band 8, the mobile phone may receive and transmit the radio frequency signal of the frequency band 28A through the first antenna 211 to be connected to the 5G mobile communication network, and simultaneously receive and transmit the radio frequency signal of the frequency band 8 through the second antenna 212 to be connected to the 4G mobile communication network.

When the mobile phone is connected with the 5G mobile communication network through the frequency band 20 and connected with the 4G mobile communication network through the frequency band 8, the radio frequency transceiver module can send and receive a second output signal and a second input signal, and a fourth output signal and a fourth input signal. At this time, the rf front end may receive the second output signal sent by the rf transceiver module through the output signal terminal 2021 of the second duplexer and send the second output signal to the first antenna 211 through the antenna terminal of the second duplexer 202, so that the first antenna 211 transmits the second output signal. Accordingly, when the first antenna 211 receives the second input signal, the first antenna 211 may transmit the second input signal to the antenna terminal of the second duplexer 202, so that the second duplexer 202 may transmit the second input signal to the rf transceiver module through the input signal terminal. The output signal terminal 2041 of the fourth duplexer receives the fourth output signal sent by the rf transceiver module and sends the fourth output signal to the second antenna 212 through the antenna terminal of the fourth duplexer 204, so that the second antenna 212 transmits the fourth output signal. Accordingly, when the second antenna 212 receives the fourth input signal, the second antenna 212 may transmit the fourth input signal to the antenna terminal of the fourth duplexer 204, so that the fourth duplexer 204 may transmit the fourth input signal to the rf transceiver module through the input signal terminal. That is, when the mobile phone is connected to the 5G mobile communication network through the frequency band 20 and connected to the 4G mobile communication network through the frequency band 8, the mobile phone may receive and transmit the radio frequency signal with the frequency band 20 through the first antenna 211 to be connected to the 5G mobile communication network, and simultaneously receive and transmit the radio frequency signal with the frequency band 8 through the second antenna 212 to be connected to the 4G mobile communication network.

Optionally, in order to enable the rf transceiver module to implement a diversity technique according to the rf front end to compensate for the loss occurring when a single signal generates information, i.e. the rf transceiver module can receive diversity signals through the rf front end, as shown in fig. 5, the rf front end may further include a diversity module 220 and a third antenna 213. The diversity module 220 is connected to the third antenna 213.

When the third antenna 213 receives the diversity signal, the third antenna 213 may transmit the diversity signal to the diversity module 220, and then the diversity module 220 may transmit the diversity signal to the radio frequency transceiver module.

The diversity signals generally correspond to the first input signal, the second input signal, the third input signal, and the fourth input signal, that is, the first input signal, the second input signal, the third input signal, and the fourth input signal are respectively the main set signals, and the main set signals are generally in the same frequency band as the corresponding diversity signals. Therefore, according to the main set signal received by the rf front end, the rf front end may receive the corresponding diversity signal through the diversity module 220 and the third antenna 213, that is, when the first antenna 211 receives the main set signal of a certain frequency band, the third antenna 213 receives the corresponding diversity signal, and when the second antenna 212 receives the main set signal of a certain frequency band, the third antenna 213 receives the corresponding diversity signal, so that the diversity signal received by the third antenna 213 may include one or more signals (e.g., including the first diversity signal, the second diversity signal, the third diversity signal, etc.).

Illustratively, the frequency bands of the first output signal and the first input signal are both frequency bands 28A; the frequency bands of the second output signal and the second input signal are both frequency bands 20; the frequency bands of the third output signal and the third input signal are both 20; the frequency bands of the fourth output signal and the fourth input signal are both frequency bands 8, and the electronic device is a mobile phone as an example. The diversity signals may comprise a first diversity signal in the frequency band 28A corresponding to the first input signal, a second diversity signal in the frequency band 20 corresponding to the second input signal and the third input signal, and a third diversity signal in the frequency band 8 corresponding to the fourth input signal. In connection with the aforementioned example where the first antenna 211 receives the first input signal while the second antenna 212 receives the third input signal, the third antenna 213 may receive a first diversity signal corresponding to the first input signal and a second diversity signal corresponding to the third input signal; in connection with the aforementioned example where the first antenna 211 receives the first input signal while the second antenna 212 receives the fourth input signal, the third antenna 213 may receive a first diversity signal corresponding to the first input signal and a third diversity signal corresponding to the fourth input signal; in connection with the aforementioned example in which the first antenna 211 receives the second input signal while the second antenna 212 receives the fourth input signal, the third antenna 213 may receive a second diversity signal corresponding to the second input signal and a third diversity signal corresponding to the fourth input signal.

Optionally, the diversity module 220 may include filters (for example, band pass filters) corresponding to the diversity signals of different frequency bands, so that the diversity signals of corresponding frequency bands in the signals received by the third antenna 213 can be transmitted to the radio frequency transceiver module through the corresponding filters, that is, different filters corresponding to the frequency ranges of the pass bands may be set according to the different receivable frequency bands of the diversity signals.

For example, the diversity signals described above in connection with the above include an example of a first diversity signal of band 28A, a second diversity signal of band 20, and a third diversity signal of band 8. Then, as shown in fig. 6, the diversity module 220 may include a first filter 221 corresponding to the first diversity signal, a second filter 222 corresponding to the second diversity signal, and a third filter 223 corresponding to the third diversity signal. Wherein the passband frequency range of the first filter 221 comprises 758MHz-788MHz, the passband frequency range of the second filter 222 comprises 791MHz-821MHz, and the passband frequency range of the third filter 223 comprises 925MHz-960 MHz.

When the third antenna 213 receives a first diversity signal corresponding to the first input signal and a second diversity signal corresponding to the third input signal, the first diversity signal may be finally directed to the rf transceiver module through the first filter 221, and the second diversity signal may be finally directed to the rf transceiver module through the second filter 222. When the third antenna 213 receives the first diversity signal corresponding to the first input signal and the third diversity signal corresponding to the fourth input signal, the first diversity signal may be finally transmitted to the rf transceiver module through the first filter 221, and the third diversity signal may be finally transmitted to the rf transceiver module through the third filter 223. When the third antenna 213 receives the second diversity signal corresponding to the second input signal and the third diversity signal corresponding to the fourth input signal, the second diversity signal may be finally passed to the rf transceiver module through the second filter 222, and the third diversity signal may be finally passed to the rf transceiver module through the third filter 223.

Optionally, as shown in fig. 5, the rf front end may further include a first switch 231 and a second switch 232, an output signal terminal 2011 of the first duplexer and an output signal terminal 2021 of the second duplexer are respectively connected to the first switch 231, and an antenna terminal of the first duplexer 201 and an antenna terminal of the second duplexer 202 are respectively connected to the first antenna 211 through the second switch 232. The first switch 231 may be used to control the output signal terminal 2011 of the first duplexer to receive the first output signal, or the output signal terminal 2021 of the second duplexer to receive the second output signal. That is, the first switch 231 may be connected to the rf transceiver module to control the on/off of the output signal terminal 2011 of the first duplexer and the output signal terminal 2021 of the second duplexer, respectively, with the rf transceiver module. The second switch 232 may be used to control the first antenna 211 to transmit the first output signal or the first antenna 211 to transmit the second output signal. That is, the second switch 232 can control the on/off of the antenna terminal of the first duplexer 201 and the antenna terminal of the second duplexer 202 with the first antenna 211, respectively.

When the rf transceiver module transmits a first output signal and receives a first input signal, the first switch 231 may control the output signal terminal 2011 of the first duplexer to communicate with the rf transceiver module, and the second switch 232 may control the antenna terminal of the first duplexer 201 to communicate with the first antenna 211. When the rf transceiver module transmits a second output signal and receives a second input signal, the first switch 231 may control the output signal terminal 2021 of the second duplexer to communicate with the rf transceiver module, and the second switch 232 may control the antenna terminal of the second duplexer 202 to communicate with the first antenna 211. Therefore, when the first antenna 211 is required to receive the first input signal or the second input signal, interference signals of other frequency bands are received by the radio frequency transceiver module, and interference is caused to the signals received by the radio frequency transceiver module.

Optionally, as shown in fig. 5, the rf front end may further include a third switch 233, a fourth switch 234, and a fifth switch 235. An output signal terminal 2031 of the third duplexer and an output signal terminal 2041 of the fourth duplexer are respectively connected to the third switch 233, an antenna terminal of the third duplexer 203 and an antenna terminal of the fourth duplexer 204 are respectively connected to the fifth switch 235 through the fourth switch 234, and the fifth switch 235 is further respectively connected to the second antenna 212, the third antenna 213 and the diversity module 220. The third switch 233 may be used to control the output signal terminal 2031 of the third duplexer to receive the third output signal, or the output signal terminal 2041 of the fourth duplexer to receive the fourth output signal. That is, the third switch 233 may be connected to the rf transceiver module to control the on/off of the output signal terminal 2031 of the third duplexer and the output signal terminal 2041 of the fourth duplexer, respectively. The fourth switch 234 and the fifth switch 235 may be used to control the second antenna 212 to transmit the third output signal or the second antenna 212 to transmit the fourth output signal. That is, the fourth switch 234 and the fifth switch 235 can jointly control the switching of the antenna terminal of the third duplexer 203 and the antenna terminal of the fourth duplexer 204 to the second antenna 212, respectively. The fifth switch 235 may also be used to control the diversity module 220 to receive the diversity signal, that is, the fifth switch 235 may also control the connection between the diversity module 220 and the third antenna 213.

When the rf transceiver module transmits a third output signal to receive a third input signal, the third switch 233 may control the output signal terminal 2031 of the third duplexer to communicate with the rf transceiver module, the fourth switch 234 may control the antenna terminal of the third duplexer 203 to communicate with the fifth switch 235, and the fifth switch 235 may control the fourth switch 234 to communicate with the second antenna 212. When the rf transceiver module transmits a fourth output signal to receive a fourth input signal, the third switch 233 may control the output signal terminal 2041 of the fourth duplexer to communicate with the rf transceiver module, the fourth switch 234 may control the antenna terminal of the fourth duplexer 204 to communicate with the fifth switch 235, and the fifth switch 235 may control the fourth switch 234 to communicate with the second antenna 212. The fifth switch 235 can also control the diversity module 220 to communicate with the third antenna 213 when the rf transceiver module needs to receive diversity signals. Therefore, when the second antenna 212 is required to receive the third input signal or the fourth input signal, interference signals of other frequency bands are received by the radio frequency transceiver module, and interference is caused to the signals received by the radio frequency transceiver module.

Optionally, as shown in fig. 6, the diversity module may further include a sixth switch 236. The fifth switch 235 may be connected to the first filter 221, the second filter 222, and the third filter 223 of the diversity module through the sixth switch 236. Therefore, when which frequency bands are included in the diversity signal received by the third antenna 213, the corresponding filters can be correspondingly connected to the third antenna 213 through the sixth switch 236. For example, the first filter 221 corresponds to a first diversity signal, the second filter 222 corresponds to a second diversity signal, and the third filter 223 corresponds to a third diversity signal. When the rf transceiver module needs to receive the first diversity signal and the second diversity signal through the third antenna 213, the fifth switch 235 may control the third antenna 213 to communicate with the sixth switch 236. The sixth switch 236 may control the fifth switch 235 to communicate with the first filter 221 and the second filter 222, respectively, such that the third antenna 213 communicates with the first filter 221 and the second filter 222, respectively. When the radio frequency transceiver module needs to receive the first diversity signal and the third diversity signal through the third antenna 213, the sixth switch 236 may control the fifth switch 235 to communicate with the first filter 221 and the third filter 223, respectively, so that the third antenna 213 communicates with the first filter 221 and the third filter 223, respectively. When the rf transceiver module needs to receive the second diversity signal and the third diversity signal through the third antenna 213, the sixth switch 236 may control the fifth switch 235 to communicate with the second filter 222 and the third filter 223, respectively, so that the third antenna 213 communicates with the second filter 222 and the third filter 223, respectively.

Optionally, as shown in fig. 5, the rf front end may further include a first amplifier 241 and a second amplifier 242. The first amplifier 241 is connected to the first switch 231, and the first amplifier 241 may amplify the power of the first output signal and the second output signal transmitted by the rf transceiver module. The second amplifier 242 is connected to the third switch 233, and the power of the third output signal and the power of the fourth output signal transmitted by the rf transceiver module can be amplified by the second amplifier 242. That is, when the rf transceiver module transmits the first output signal or the second output signal, the first output signal can be amplified by the first amplifier 241 and then transmitted to the first duplexer 201 or the second duplexer 202. When the rf transceiver module transmits the third output signal or the fourth output signal, the third output signal or the fourth output signal can be amplified by the second amplifier 242, and then the third output signal or the fourth output signal goes to the third duplexer 203 or the fourth duplexer 204.

Corresponding to the rf front end in the foregoing embodiments, the present application further provides an rf chip, as shown in fig. 7, the rf chip may include an rf transceiver module 300 and the rf front end in the foregoing embodiments. The rf transceiver module 300 may be respectively connected to the output signal terminal 2011 of the first duplexer, the input signal terminal 2012 of the first duplexer, the output signal terminal 2021 of the second duplexer, the input signal terminal 2022 of the second duplexer, the output signal terminal 2031 of the third duplexer, the input signal terminal 2032 of the third duplexer, the output signal terminal 2041 of the fourth duplexer, and the input signal terminal 2042 of the fourth duplexer of the rf front end. Of course, if the rf front end further includes the diversity module 220, the rf transceiver module 300 may also be connected to the diversity module 220, and when the diversity module 220 includes the first filter 221, the second filter 222 and the third filter 223, the rf transceiver module 300 may be connected to the first filter 221, the second filter 222 and the third filter 223, respectively. When the rf front end further includes a first switch 231 and a third switch 233, the rf transceiver module 300 may be connected to the output signal terminal 2011 of the first duplexer and the output signal terminal 2021 of the second duplexer through the first switch 231, and connected to the output signal terminal 2031 of the third duplexer and the output signal terminal 2041 of the fourth duplexer through the third switch 233, respectively. When the rf front end further includes a first amplifier 241 and a second amplifier 242, the rf transceiver module 300 may be connected to the first switch 231 through the first amplifier 241 and connected to the second switch 232 through the second amplifier 242.

In an embodiment of the present application, an electronic device is further provided, where the electronic device may include the radio frequency chip, so as to convert a baseband signal of a baseband signal baseband chip into a radio frequency signal and transmit the radio frequency signal through an antenna, and convert a radio frequency signal received by the antenna into a baseband signal through the radio frequency chip and transmit the baseband signal to the baseband chip for processing, thereby implementing remote mobile communication.

The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A radio frequency front end for use in an electronic device, the radio frequency front end comprising:

an output signal end of the first duplexer is used for receiving a first output signal sent by a radio frequency transceiver module, an input signal end of the first duplexer is used for sending a received first input signal to the radio frequency transceiver module, an antenna end of the first duplexer is connected with a first antenna, the first antenna is used for transmitting the first output signal and receiving the first input signal, and the frequency band of the first output signal is the same as that of the first input signal;

an output signal end of the second duplexer is configured to receive a second output signal sent by the radio frequency transceiver module, an input signal end of the second duplexer is configured to send a received second input signal to the radio frequency transceiver module, an antenna end of the second duplexer is connected to the first antenna, the first antenna is further configured to transmit the second output signal and receive the second input signal, and the second output signal and the second input signal have the same frequency band;

an output signal end of the third duplexer is used for receiving a third output signal sent by the radio frequency transceiver module, an input signal end of the third duplexer is used for sending a received third input signal to the radio frequency transceiver module, an antenna end of the third duplexer is connected with a second antenna, the second antenna is used for transmitting the third output signal and receiving the third input signal, and the third output signal and the third input signal have the same frequency band;

an output signal end of the fourth duplexer is used for receiving a fourth output signal sent by the radio frequency transceiver module, an input signal end of the fourth duplexer is used for sending a received fourth input signal to the radio frequency transceiver module, an antenna end of the fourth duplexer is connected with the second antenna, the second antenna is further used for transmitting the fourth output signal and receiving the fourth input signal, and the frequency bands of the fourth output signal and the fourth input signal are the same;

wherein frequency bands of at least three of the first output signal, the second output signal, the third output signal, and the fourth output signal are different from each other.

2. The radio frequency front end of claim 1, further comprising a diversity module and a third antenna; the diversity module is connected with the third antenna, the diversity module is used for sending the received diversity signal to the radio frequency transceiver module, and the third antenna is used for receiving the diversity signal.

3. The rf front end of claim 2, wherein the diversity signals comprise at least one of a first diversity signal, a second diversity signal and a third diversity signal with different frequency bands, the diversity module comprises a first filter, a second filter and a third filter respectively connected to the third antenna, the first filter is configured to transmit the first diversity signal to the rf transceiver module, the second filter is configured to transmit the second diversity signal to the rf transceiver module, and the third filter is configured to transmit the third diversity signal to the rf transceiver module.

4. The radio frequency front end of claim 3, wherein the passband frequency range of the output signal end of the first duplexer comprises 703MHz-733MHz, the passband frequency range of the input signal end of the first duplexer comprises 758MHz-788MHz, the passband frequency range of the output signal end of the second duplexer comprises 832MHz-862MHz, the passband frequency range of the input signal end of the second duplexer comprises 791MHz-821MHz, the passband frequency range of the output signal end of the third duplexer comprises 832MHz-862MHz, the passband frequency range of the input signal end of the third duplexer comprises 791-821 MHz, the passband frequency range of the output signal end of the fourth duplexer comprises 880MHz-915MHz, the passband frequency range of the input signal end of the fourth duplexer comprises 925MHz-960MHz, the passband frequency range of the first filter comprises 758-788 MHz, the passband frequency range of the second filter comprises 791-821 MHz, and the passband frequency range of the third filter comprises 925-960 MHz.

5. The radio frequency front end of claim 4, wherein the frequency bands of the first output signal and the first input signal are both 28A, the frequency range of the first output signal is 703MHz-733MHz, and the frequency range of the first input signal is 758MHz-788 MHz; the frequency bands of the second output signal and the second input signal are both 20, the frequency range of the second output signal is 832MHz-862MHz, and the frequency range of the second input signal is 791MHz-821 MHz; the frequency bands of the third output signal and the third input signal are both 20, the frequency range of the third output signal is 832-862 MHz, and the frequency range of the third input signal is 791-821 MHz; the frequency bands of the fourth output signal and the fourth input signal are both 8, the frequency range of the fourth output signal is 880MHz-915MHz, and the frequency range of the fourth input signal is 925MHz-960 MHz;

when the electronic device is connected to a fifth generation mobile communication network through a frequency band 28A and is connected to a fourth generation mobile communication network through a frequency band 20, the first antenna transmits the first output signal and receives the first input signal, and the second antenna transmits the third output signal and receives the third input signal;

when the electronic device is connected to a fifth generation mobile communication network through a frequency band 28A and is connected to a fourth generation mobile communication network through a frequency band 8, the first antenna transmits the first output signal and receives the first input signal, and the second antenna transmits the fourth output signal and receives the fourth input signal;

when the electronic device is connected to a fifth generation mobile communication network through a frequency band 20 and is connected to a fourth generation mobile communication network through a frequency band 8, the first antenna transmits the second output signal and receives the second input signal, and the second antenna transmits the fourth output signal and receives the fourth input signal.

6. The radio frequency front end according to any of claims 3 to 5, further comprising a first switch and a second switch; an output signal end of the first duplexer and an output signal end of the second duplexer are respectively connected with the first switch, an antenna end of the first duplexer and an antenna end of the second duplexer are respectively connected with the first antenna through the second switch, the first switch is used for controlling the output signal end of the first duplexer to receive the first output signal, or the output signal end of the second duplexer to receive the second output signal, and the second switch is used for controlling the first antenna to transmit the first output signal, or the first antenna to transmit the second output signal.

7. The radio frequency front end of claim 6, further comprising a third switch, a fourth switch, and a fifth switch; the output signal end of third duplexer with the output signal end of fourth duplexer respectively with the third switch is connected, the antenna end of third duplexer with the antenna end of fourth duplexer passes through respectively the fourth switch with the fifth switch is connected, the fifth switch still respectively with the second antenna the third antenna with the diversity module is connected, the third switch is used for control the output signal end of third duplexer receives the third output signal, perhaps the output signal end of fourth duplexer receives the fourth output signal, the fourth switch with the fifth switch is used for control the second antenna transmission the third output signal, or the second antenna transmission the fourth output signal, the fifth switch still is used for control the diversity module is received the diversity signal.

8. The radio frequency front end of claim 7, wherein the diversity module further comprises a sixth switch, the fifth switch is connected to the first filter, the second filter and the third filter through the sixth switch, and the sixth switch is configured to control at least one of the first filter, the second filter and the third filter to communicate with the third antenna.

9. The rf front-end according to claim 8, further comprising a first amplifier and a second amplifier, wherein the first amplifier is connected to the first switch, the first amplifier is configured to amplify the first output signal and the second output signal transmitted by the rf transceiver module, the second amplifier is connected to the third switch, and the second amplifier is configured to amplify the third output signal and the fourth output signal transmitted by the rf transceiver module.

10. A radio-frequency chip, characterized in that it comprises a radio-frequency transceiver module and a radio-frequency front-end according to any one of claims 1 to 9.

11. An electronic device, characterized in that it comprises a radio-frequency chip as claimed in claim 10.